Radiative recombination features of metastable quantum dot array

Metastable quantum dot (QD) arrays were grown by submonolayer migration enh anced epitaxy (SMEE) mode on GaAs(100) singular and vicinal substrates. It has: been established that two QD groups are formed on the vicinal surface. These groups - conjunct QDs (CQD) and isolated QDs (IQD) - demonstrate a b asically different behavior in their photoluminescence spectra. The CQDs fo rm chain-like structures. They lay on the wetting layer which connects them to each other. The IQDs are formed due to wetting layer rupture directly o n the GaAs surface at the terrace edges. They are isolated and not connecte d to the rest QD array.